Nerdy Poly Millionaires


    0.1.0 • Public • Published


    Oskar is a lightweight Javascript module for generating on-screen keyboards. It might look like the screenshot below, but that's up to you - it's fully customisable with CSS.

    Oskar Screenshot


    Hacker, I beseech thee; use browserify. Please. Life's too short for require.js and all the associated fuckery.

    Basic Usage

    var oskar = require('oskar');
    var keyboard = oskar();

    That's it!


    Oskar's keymap is fully customisable. A keymap is specified as a named set of layers, only one of which is visible at any given time. Any key may specify a transition to a different layer, allowing implementation of any number of alternate layouts. This is useful, for example, for implementing a shift key.

    A layer itself is specified as an array of rows, each row being an array of key descriptors. A key descriptor can be either:

    • an object, recognised properties being:
      • cap, string: symbol to display on keyboard
      • value, any type: value to emit when this key is pressed (defaults to the key cap itself)
      • toLayer, string: switch to this layer on key press (for implementing shift etc)
      • className, string: additional class name to be added to this key's DOM element
    • a string, shorthand for {cap: $string}

    As a special case, any key specified by a single space ' ' will be automatically augmented with the space class.

    Here's the default keymap which supports lower/upper-case letters, digits, and some punctuation:

    var keyMap = {
        0: [
            ['1', '2', '3', '4', '5', '6', '7', '8', '9', '0'],
            ['q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p'],
            ['a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l'],
            [{cap: '\u21e7', toLayer: 1, className: 'shift'},
                'z', 'x', 'c', 'v', 'b', 'n', 'm', {cap: '\u232b', value: 'backspace'}],
            [' ']
        1: [
            ['!', '@', '£', '$', '%', '^', '&', '*', '(', ')'],
            ['Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P'],
            ['A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L'],
            [{cap: '\u21e7', toLayer: 0, className: 'shift'},
                'Z', 'X', 'C', 'V', 'B', 'N', 'M', {cap: '\u232b', value: 'backspace'}],
            [' ']

    And custom keymaps are passed via the options object:

    var keyboard = oskar({keyMap: keys});

    Handling Events

    The configuration option onkeypress is used to supply a function that will be called when the user presses a key on the keyboard. It receives a single argument: the value of the pressed key.

    var keyboard = oskar({onkeypress: function(value) {
        console.log("you pressed: " + value);

    As a convenience, Oskar provides a sendTo() method which will automatically hook its output up to an input element:

    var keyboard = oskar();

    The installed handler recognises a couple of special key values:

    • backspace: deletes the last character
    • enter: triggers a user-specified callback - passed as a second parameter to sendTo() - with theinput` element's current value.


    Oskar uses a bunch of classes to identify its various elements:

    • .osk: wrapper element
    • .osk-row: each row of keys
    • .osk-row-{n}: nth row of keys (zero-indexed)
    • .osk-key: an individual key
    • .osk-key.$keyClass: keys can be given specific classes; see Customisation, above

    Please refer to the styles in example/index.htm to see a bloat-free working example.


    npm i oskar

    DownloadsWeekly Downloads






    Last publish


    • jaz303